132 lines
3.7 KiB
C++
132 lines
3.7 KiB
C++
#ifndef FORTUNA_FORTUNA_CPP
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#define FORTUNA_FORTUNA_CPP
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#include "fortuna.h"
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#include "seed_file_management.h"
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#include "util.h"
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#include <cryptopp/cryptlib.h>
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#include <fmt/chrono.h>
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#include <chrono>
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#include <exception>
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#include <mutex>
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namespace fortuna {
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static constexpr const unsigned int min_pool_size{64};
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auto now{std::chrono::steady_clock::now()};
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Fortuna::Fortuna() {
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try {
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initialize_prng();
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}
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catch (CryptoPP::Exception& e) {
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fmt::print(stderr, "{}\n", e.what());
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}
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th_gen = std::thread(generator_service, &R.Gen);
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th_sfm = std::thread(&Fortuna::seed_file_manager_service, this);
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}
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Fortuna::~Fortuna() noexcept {
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th_gen.join();
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th_sfm.join();
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}
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auto Fortuna::random_data(unsigned int n_bytes) -> void {
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const auto start{std::chrono::system_clock::now()};
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fmt::print("random_data starting - {}\n", start);
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auto elapsed{std::chrono::duration_cast<std::chrono::milliseconds>(
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std::chrono::steady_clock::now().time_since_epoch() -
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now.time_since_epoch())};
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fmt::print("last_reseed: {} ago\n", elapsed);
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now = std::chrono::steady_clock::now();
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std::string s;
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// synchronise reads and writes to the between
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// {generator,accumulator,fortuna} service threads -> in member functions
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const int pools_to_use{ffsll(static_cast<int>(get_reseed_ctr()))};
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if (R.pools[0].get_s_length() >= min_pool_size &&
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elapsed > R.Gen.reseed_interval) {
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for (int i = 0; i < static_cast<int>(pools_to_use); ++i) {
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if (R.reseed_ctr % static_cast<int>(pow(2, i)) == 0) {
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try {
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s.append(fortuna::Util::do_sha(R.pools[i].get_s()));
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R.pools[i].clear_pool();
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}
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catch (std::exception& e) {
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fmt::print("{}\n", e.what());
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}
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}
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}
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incr_reseed_ctr();
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R.Gen.reseed(s);
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R.last_reseed = std::chrono::steady_clock::now();
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s.clear();
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}
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if (R.reseed_ctr == 0) {
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fmt::print("reseed ctr is 0, PRNG not seeded!\n");
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throw std::runtime_error("illegal state, PRNG not seeded");
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}
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else {
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std::string n{R.Gen.generate_random_data(n_bytes)};
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fmt::print("got you {} proper bytes from generate_random_data -> {}\n",
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n_bytes, n);
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n.clear();
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}
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const auto end{std::chrono::system_clock::now()};
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std::chrono::duration<float> diff = end - start;
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fmt::print("random_data done - {}\n", end);
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fmt::print("getting random data took {:.{}f}s\n", diff.count(), 12);
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} // random_data
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auto Fortuna::generator_service(fortuna::generator::Generator* Gen) -> void {
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fmt::print("[i] fortuna: starting generator service\n");
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int i{0};
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uint sleep_time{1000}; // in ms
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std::chrono::system_clock::time_point time_point;
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while (true) {
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fmt::print("sleeping [{}]\n", i);
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++i;
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time_point = fortuna::Util::current_time();
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fmt::print("[*] g: @{}\n", time_point);
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std::this_thread::sleep_until(time_point +
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std::chrono::milliseconds(sleep_time));
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}
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}
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auto Fortuna::seed_file_manager_service() -> void {
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std::lock_guard<std::mutex> lg(mtx);
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fmt::print("[i] fortuna: starting seed file manager service\n");
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static constexpr const std::chrono::seconds checkup_interval{10};
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fmt::print("[*] sfm: checkup interval {}\n", checkup_interval);
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auto right_now{fortuna::Util::current_time()};
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SeedFileManager sfm(this->accumulator);
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while (true) {
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right_now = fortuna::Util::current_time();
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fmt::print("[*] sfm: checkup time @{}\n", right_now);
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if (!sfm.is_job_running()) {
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fmt::print("[*] sfm: job not running, starting\n");
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try {
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sfm.do_stuff();
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}
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catch (std::exception& e) {
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fmt::print(stderr, "[!] sfm: exception caught: {}\n", e.what());
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}
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}
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else {
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fmt::print("[*] sfm: job running\n");
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}
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std::this_thread::sleep_until(right_now +
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std::chrono::seconds(checkup_interval));
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}
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}
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} // namespace fortuna
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#endif // FORTUNA_FORTUNA_CPP
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